Answer:
The genetic disease may be defined as the disease that can be pass down from the parents to their progeny. Different types of inherited disease are cystic fibrosis, sickle cell anemia and thalassemia.
The defect in the mitochondrial gene can also be transfer from one generation to the next generation. In this case the disease is transfer from the mother to their offspring as the mitochondria of the mother only can be transmitted to the offspring. The trait cannot be passed by the fathers.
a. True
b. False
The statement “Bones provide both structure and protection for the body.” is true because Bones indeed provide both structure and protection for the body.
Bones fulfill a dual role in the body, offering both structure and protection. They provide the framework that maintains the body's shape, allowing movement and providing stability. Additionally, bones act as a sturdy shield for vital organs, such as the brain, heart, and lungs, safeguarding them from external forces. Their protective function reduces the risk of injury to these delicate organs.
Bones serve as a mineral reservoir, storing essential minerals like calcium and phosphorus, which are released into the bloodstream as needed. They also house the bone marrow, where the production of red and white blood cells occurs, supporting the immune system and ensuring proper blood function. In summary, bones contribute to the body's structure, protect vital organs, store minerals, and produce blood cells, thereby maintaining overall health and well-being, the statement is true.
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B. mutualistic symbionts.
C. herbivores.
D. parasitic symbionts.
In general, more complex animals are
A. More likely to rely on chemical digestion than to rely on mechanical digestion
B. more likely to perform intracellular digestion than extracellular digestion
C. more likely to have one body opening than to have two body openings
D. more likely to have a digestion tract than to have a gastrovascular cavity
Answer: 1. B. mutualistic symbionts.
Explanation:
A mutualistic symbiotic relationship is the one in which the two species lives in close association and both of the species obtains the benefit of living together.
Cattle depend on microorganisms in their digestive tract to digest the cellulose in their diets is the example of mutualistic symbiotic relationship. This is due to the fact that cellulose is a biomolecule which is obtain in leafy diets of the cattles. This is difficult to digest by the digestive system of the body of these cattles therefore, the function of digestion is performed by the microbes present in the digestive tract. Both of the organisms attains nourishment after this process.
Answer: 2. D. more likely to have a digestion tract than to have a gastrovascular cavity.
The complex animals are expected to have a complex digestive system. The gastrovascular cavity secretes digestive juices which aids in the process of digestion.
The trait causes a change in the environment surrounding the organism.
The trait decreases the number of genes in the body cells of the organism.
The trait is due to the genetic code present in the organism’s gametes.
Answer:
1. Birds have feathers of different colours.
2. Woodpeckers have long beaks.
3. Sunbird is a non-migratory bird.
or
3. Sunbird is sedentary bird.
Explanation:
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The example that best describes incomplete dominance is sheep with gray fleece. The correct answer is option d.
Incomplete dominance is a pattern of inheritance in which the heterozygous phenotype is intermediate between those of the homozygous dominant and homozygous recessive genotypes.
In the case of the sheep with gray fleece, the gray phenotype is the result of a cross between a white sheep (homozygous dominant for the "white" allele) and a black sheep (homozygous recessive for the "white" allele). The heterozygous offspring inherit one "white" allele and one "black" allele, resulting in a phenotype that is intermediate between white and black - in this case, gray.
So, the correct answer is option d) sheep with gray fleece.
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